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XPS Method to Study the Effect of Heat Treatments and Environment on the Electric Dipole Formation at Metal/High-κ Dielectric Interface

Published online by Cambridge University Press:  31 January 2011

Andrei Zenkevich ,
Yuri Lebedinski ,
Yuri Matveyev  and
Vladimir Tronin
Andrei Zenkevich
Affiliation:
a.zenkevich@mephi.ru, Moscow Engineering Physics institute, Dept. of Solid State Physics and Nanosystems, Moscow, Russian Federation
Yuri Lebedinski
Affiliation:
lebedinski@mephi.ru, Moscow Engineering Physics institute, Analytical laboratory, Moscow, Russian Federation
Yuri Matveyev
Affiliation:
y.matveev@gmail.com, Moscow Engineering Physics institute, Dept. of Solid State Physics and Nanosystems, Moscow, Russian Federation
Vladimir Tronin
Affiliation:
vntronin@mephi.ru, Moscow Engineering Physics institute, Dept. of Molecular Physics, Moscow, Russian Federation
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Abstract

X-ray photoelectron spectroscopy (XPS) technique is employed in situ to quantify changes in the electric dipole formed at the metal/dielectric interface. The proposed method is valid in the particular case of discontinuous metal overlayer in contact with dielectric, and allows one to model metal gate effective work function evolution of metal-oxide-semiconductor (MOS) stack following its treatments in different environments. The obtained results on Au / dielectric (dielectric=HfO2, LaAlO3) corroborate the model that the oxygen vacancies generated in dielectric contribute to the effective work function changes.

Keywords

dielectricelectrical propertiesx-ray photoelectron spectroscopy (XPS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1155: Symposium C – CMOS Gate-Stack Scaling–Materials, Interfaces and Reliability Implications , 2009 , 1155-C03-03
Copyright
Copyright © Materials Research Society 2009

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